MCR03EZPFX3903 Equivalent & Substitute Parts

Part Overview

The MCR03EZPFX3903 is a 390 kOhms ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Rohm Semiconductor. This automotive-grade component meets AEC-Q200 specifications and operates across -55°C to 155°C. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain identical electrical and mechanical characteristics for direct board-level substitution.

Substiute Parts

MCR03EZPFX3903

Rohm SemiconductorIn Stock: 917MCR03EZPFX3903 Datasheet

Current PartRFQ

KTR03EZPF3903

Rohm SemiconductorIn Stock: 5323KTR03EZPF3903 Datasheet

UpgradeRFQ

CRCW0603390KFKEA

Vishay DaleIn Stock: 42381CRCW0603390KFKEA Datasheet

DirectRFQ

ERJ-3EKF3903V

Panasonic Electronic ComponentsIn Stock: 97870ERJ-3EKF3903V Datasheet

DirectRFQ

RMCF0603FG390K

Stackpole Electronics IncIn Stock: 3776RMCF0603FG390K Datasheet

DirectRFQ

RMCF0603FT390K

Stackpole Electronics IncIn Stock: 80327RMCF0603FT390K Datasheet

DirectRFQ

CR0603-FX-3903ELF

Bourns Inc.In Stock: 31570CR0603-FX-3903ELF Datasheet

SimilarRFQ

RC0603FR-07390KL

YAGEOIn Stock: 112355RC0603FR-07390KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: resistance value (390 kOhms), tolerance (±1%), power rating (0.1W), package type (0603), composition (thick film), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). All substitute parts listed maintain these core electrical specifications. Packaging format (Tape & Reel, Cut Tape, or Digi-Reel) does not affect electrical or mechanical compatibility. Automotive AEC-Q200 certification is present in direct substitutes; similar parts without this certification remain functionally equivalent but lack automotive qualification. Dimensional variations within tolerance (length 1.55–1.60mm, width 0.80–0.85mm, height 0.50–0.55mm) are acceptable for standard PCB assembly processes.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring automotive AEC-Q200 compliance, select from the direct substitute group: KTR03EZPF3903 (Rohm Semiconductor), CRCW0603390KFKEA (Vishay Dale), ERJ-3EKF3903V (Panasonic Electronic Components), RMCF0603FG390K or RMCF0603FT390K (Stackpole Electronics Inc). All maintain identical electrical specifications and automotive qualification. KTR03EZPF3903 offers the advantage of same-manufacturer sourcing from Rohm Semiconductor with 5,299 units in stock. RMCF0603FT390K provides the highest inventory availability at 80,278 units. ERJ-3EKF3903V offers 97,790 units in stock.

For non-automotive applications where AEC-Q200 certification is not required, CR0603-FX-3903ELF (Bourns Inc.) and RC0603FR-07390KL (YAGEO) are functionally equivalent alternatives with active product status and substantial inventory availability (31,543 and 112,311 units respectively).

Frequently Asked Questions (FAQ)

Q: Can MCR03EZPFX3903 be replaced with KTR03EZPF3903? A: Yes. Both parts are manufactured by Rohm Semiconductor and share identical electrical specifications: 390 kOhms ±1%, 0.1W, 0603 package, ±100ppm/°C temperature coefficient, -55°C to 155°C operating range, and AEC-Q200 automotive certification. The primary difference is packaging format (KTR03EZPF3903 is supplied in Tape & Reel).

Q: What is the difference between direct and similar substitute parts? A: Direct substitutes (KTR03EZPF3903, CRCW0603390KFKEA, ERJ-3EKF3903V, RMCF0603FG390K, RMCF0603FT390K) maintain AEC-Q200 automotive certification. Similar parts (CR0603-FX-3903ELF, RC0603FR-07390KL) lack automotive qualification but are electrically and mechanically equivalent. Selection depends on application requirements.

Q: Does packaging format (Tape & Reel vs. Cut Tape) affect compatibility? A: No. Packaging format affects only handling and assembly logistics, not electrical or mechanical performance. All listed parts are compatible regardless of packaging format.

Q: Are dimensional variations between manufacturers significant? A: Dimensional variations (length 1.55–1.60mm, width 0.80–0.85mm, height 0.50–0.55mm) fall within standard PCB assembly tolerances and do not affect board-level compatibility or performance.

Q: Which substitute offers the best inventory availability? A: RC0603FR-07390KL (YAGEO) has the highest inventory at 112,311 units. For automotive-qualified parts, ERJ-3EKF3903V (Panasonic) offers 97,790 units and RMCF0603FT390K (Stackpole) offers 80,278 units.

Q: Can I use a non-AEC-Q200 part in an automotive application? A: This depends on application-specific requirements and design specifications. Automotive applications typically require AEC-Q200 certification. Consult design documentation to determine if certification is mandatory.